sl@0: // Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
sl@0: // All rights reserved.
sl@0: // This component and the accompanying materials are made available
sl@0: // under the terms of "Eclipse Public License v1.0"
sl@0: // which accompanies this distribution, and is available
sl@0: // at the URL "http://www.eclipse.org/legal/epl-v10.html".
sl@0: //
sl@0: // Initial Contributors:
sl@0: // Nokia Corporation - initial contribution.
sl@0: //
sl@0: // Contributors:
sl@0: //
sl@0: // Description:
sl@0: // Implementation of the FontInjector DLL, only for the emulator. This DLL has
sl@0: // writeable static data and should use the EPOCALLOWDLLDATA keyword in the MMP
sl@0: // file, but it does not because by default the EKA2 emulator allows global data
sl@0: // as long as the constructors do not make executive calls and, in some test
sl@0: // cases, there is more than one instance of the test server with this DLL loaded,
sl@0: // although it should be in active use by only one process at a time. For more
sl@0: // information see the Symbian Developer Library > Symbian OS Guide > Essential
sl@0: // idioms > Static data.
sl@0: //
sl@0: 
sl@0: #include "fontinjector.h"
sl@0: 
sl@0: #ifdef __WINS__
sl@0: 
sl@0: template<class C> EXPORT_C XVtableInjector<C>::XVtableInjector()
sl@0: 	{
sl@0: 	ASSERT(gObjects.Count() == 0);
sl@0: 	ASSERT(!gShellcode);
sl@0: 	ASSERT(!gOriginalVtable);
sl@0: 	}
sl@0: 
sl@0: template<class C> EXPORT_C XVtableInjector<C>::~XVtableInjector()
sl@0: 	{
sl@0: 	for (TInt i = 0; i < gObjects.Count(); ++i)
sl@0: 		{
sl@0: 		*reinterpret_cast<TAny**>(gObjects[i]) = gOriginalVtable;
sl@0: 		}
sl@0: 	gObjects.Close();
sl@0: 	gShellcode = NULL;
sl@0: 	gOriginalVtable = NULL;
sl@0: 	}
sl@0: 
sl@0: template<class C> EXPORT_C TInt XVtableInjector<C>::InjectShellcode(C* aObject, MShellcode* aShellcode)
sl@0: 	{
sl@0: 	if (gShellcode && gShellcode != aShellcode)
sl@0: 		{
sl@0: 		return KErrArgument;
sl@0: 		}
sl@0: 	TInt err = KErrNone;
sl@0: 	if (gObjects.FindInAddressOrder(aObject) == KErrNotFound)
sl@0: 		{
sl@0: 		if (gOriginalVtable && gOriginalVtable != *reinterpret_cast<TAny**>(aObject))
sl@0: 			{
sl@0: 			return KErrArgument;
sl@0: 			}
sl@0: 		err = gObjects.InsertInAddressOrder(aObject);
sl@0: 		if (err == KErrNone)
sl@0: 			{
sl@0: 			gShellcode = aShellcode;
sl@0: 			gOriginalVtable = *reinterpret_cast<TAny**>(aObject);
sl@0: 			*reinterpret_cast<TAny**>(aObject) = *reinterpret_cast<TAny**>(this);
sl@0: 			}
sl@0: 		}
sl@0: 	return err;
sl@0: 	}
sl@0: 
sl@0: template<> EXPORT_C void XVtableInjector<CFont>::GetVirtualFunctionName(TInt aIndex, TDes& aName)
sl@0: 	{
sl@0: 	switch (aIndex)
sl@0: 		{
sl@0: 	case 0:
sl@0: 		aName.Copy(_S("CFont::~CFont()"));
sl@0: 		break;
sl@0: 	case 1:
sl@0: 		aName.Copy(_S("CFont::Extension_(TUint, TAny*&, TAny*)"));
sl@0: 		break;
sl@0: 	case 2:
sl@0: 		aName.Copy(_S("CFont::DoTypeUid()"));
sl@0: 		break;
sl@0: 	case 3:
sl@0: 		aName.Copy(_S("CFont::DoHeightInPixels()"));
sl@0: 		break;
sl@0: 	case 4:
sl@0: 		aName.Copy(_S("CFont::DoAscentInPixels()"));
sl@0: 		break;
sl@0: 	case 5:
sl@0: 		aName.Copy(_S("CFont::DoDescentInPixels()"));
sl@0: 		break;
sl@0: 	case 6:
sl@0: 		aName.Copy(_S("CFont::DoCharWidthInPixels(TChar)"));
sl@0: 		break;
sl@0: 	case 7:
sl@0: 		aName.Copy(_S("CFont::DoTextWidthInPixels(const TDesC&)"));
sl@0: 		break;
sl@0: 	case 8:
sl@0: 		aName.Copy(_S("CFont::DoBaselineOffsetInPixels()"));
sl@0: 		break;
sl@0: 	case 9:
sl@0: 		aName.Copy(_S("CFont::DoTextCount(const TDesC&, TInt)"));
sl@0: 		break;
sl@0: 	case 10:
sl@0: 		aName.Copy(_S("CFont::DoTextCount(const TDesC&, TInt, TInt&)"));
sl@0: 		break;
sl@0: 	case 11:
sl@0: 		aName.Copy(_S("CFont::DoMaxCharWidthInPixels()"));
sl@0: 		break;
sl@0: 	case 12:
sl@0: 		aName.Copy(_S("CFont::DoMaxNormalCharWidthInPixels()"));
sl@0: 		break;
sl@0: 	case 13:
sl@0: 		aName.Copy(_S("CFont::DoFontSpecInTwips()"));
sl@0: 		break;
sl@0: 	case 14:
sl@0: 		aName.Copy(_S("CFont::DoGetCharacterData(TUint, TOpenFontCharMetrics&, const TUint8*&, TSize&)"));
sl@0: 		break;
sl@0: 	case 15:
sl@0: 		aName.Copy(_S("CFont::DoGetCharacterPosition(CFont::TPositionParam&)"));
sl@0: 		break;
sl@0: 	case 16:
sl@0: 		aName.Copy(_S("CFont::DoExtendedFunction(TUid, TAny*)"));
sl@0: 		break;
sl@0: 	default:
sl@0: 		aName.Copy(_S("CFont::<Unknown Virtual Function>"));
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: template<> EXPORT_C void XVtableInjector<COpenFont>::GetVirtualFunctionName(TInt aIndex, TDes& aName)
sl@0: 	{
sl@0: 	switch (aIndex)
sl@0: 		{
sl@0: 	case 0:
sl@0: 		aName.Copy(_S("COpenFont::~COpenFont()"));
sl@0: 		break;
sl@0: 	case 1:
sl@0: 		aName.Copy(_S("COpenFont::Extension_(TUint, TAny*&, TAny*)"));
sl@0: 		break;
sl@0: 	case 2:
sl@0: 		aName.Copy(_S("COpenFont::RasterizeL(TInt, TOpenFontGlyphData*)"));
sl@0: 		break;
sl@0: 	case 3:
sl@0: 		aName.Copy(_S("COpenFont::ExtendedInterface(TUid, TAny*&)"));
sl@0: 		break;
sl@0: 	default:
sl@0: 		aName.Format(_L("COpenFont::<Extended Virtual Function %03d>"), aIndex - 3);
sl@0: 		}
sl@0: 	}
sl@0: 
sl@0: template<class C> void XVtableInjector<C>::ObjectDestroyed(TAny* aObject)
sl@0: 	{
sl@0: 	gObjects.Remove(gObjects.FindInAddressOrder(aObject));
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function000()
sl@0: 	{
sl@0: 	asm { push ecx }
sl@0: 	/* cdecl calling convention */
sl@0: 	asm { push ecx }
sl@0: 	asm { call ObjectDestroyed }
sl@0: 	asm { add esp, 4 }
sl@0: 	/* thiscall calling convention */
sl@0: 	asm { mov ecx, gShellcode }
sl@0: 	asm { push 0 }
sl@0: 	asm { mov eax, [ecx] }
sl@0: 	asm { call [eax] }
sl@0: 	/* continue to original function */
sl@0: 	asm { pop ecx }
sl@0: 	asm { mov eax, gOriginalVtable }
sl@0: 	asm { jmp [eax] }
sl@0: 	}
sl@0: 
sl@0: #define DISPATCH_NTH_VIRTUAL_FUNCTION(n) \
sl@0: 	asm { push ecx } \
sl@0: 	/* thiscall calling convention */ \
sl@0: 	asm { mov ecx, gShellcode } \
sl@0: 	asm { push n } \
sl@0: 	asm { mov eax, [ecx] } \
sl@0: 	asm { call [eax] } \
sl@0: 	/* continue to original function */ \
sl@0: 	asm { pop ecx } \
sl@0: 	asm { mov eax, gOriginalVtable } \
sl@0: 	asm { jmp [eax + (n * 4)] }
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function001()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(1)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function002()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(2)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function003()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(3)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function004()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(4)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function005()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(5)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function006()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(6)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function007()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(7)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function008()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(8)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function009()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(9)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function010()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(10)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function011()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(11)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function012()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(12)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function013()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(13)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function014()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(14)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function015()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(15)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function016()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(16)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function017()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(17)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function018()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(18)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function019()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(19)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function020()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(20)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function021()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(21)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function022()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(22)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function023()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(23)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function024()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(24)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function025()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(25)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function026()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(26)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function027()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(27)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function028()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(28)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function029()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(29)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function030()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(30)
sl@0: 	}
sl@0: 
sl@0: template<class C> void __declspec(naked) XVtableInjector<C>::Function031()
sl@0: 	{
sl@0: 	DISPATCH_NTH_VIRTUAL_FUNCTION(31)
sl@0: 	}
sl@0: 
sl@0: template<class C> RPointerArray<TAny> XVtableInjector<C>::gObjects;
sl@0: template<class C> MShellcode* XVtableInjector<C>::gShellcode = NULL;
sl@0: template<class C> TAny* XVtableInjector<C>::gOriginalVtable = NULL;
sl@0: 
sl@0: // Explicit instantiation of the injector classes.
sl@0: template class XVtableInjector<CFont>;
sl@0: template class XVtableInjector<COpenFont>;
sl@0: 
sl@0: #endif // __WINS__